Kim Harrison has made a great, unique YA series with the Madison Avery series. In the third book of the series, Madison Avery is still learning how to be a dark timekeeper. She's not happy with the way that the system works and thinks that she can change things. She begins to doubt herself when it seems like no one believes in her and nothing seems to go the way that she wants it to. Luckily she has Barnabas (the former light reaper), Nakita (a dark reaper), and Josh (her boyfriend) to help her get through it. If you want an easy read that is also unique, I would recommend this series.